Steghide - Steghide is a steganography program that is able to hide data in various kinds of image- and...
Windows BitLocker - This topic provides a high-level overview of BitLocker, including a list of system requirements, practical applications, and deprecated features.
DeepSound - DeepSound is the way of hiding your message in an audio file.
File Lock PEA - Password-encryption of files and directories. File PEA encrypts files and folders with authenticated encryption to protect confidentiality and integrity. The program uses memory-hard key derivation functions to prevent custom hardware attacks.
OpenPuff - OpenPuff is a professional steganography tool: HW seeded random number generator (CSPRNG)
Axcrypt - AxCrypt - Password Protect Files With Strong Encryption. AxCrypt is the leading open source file encryption software for Windows.